Power Electronics

Optocouplers Deliver High Output Peak Current, Rail-to-Rail Output Voltage and Fast Switching Speed

Avago Technologies announced a new generation of gate drive optocouplers that deliver industry-leading performance from a small-footprint package. The new ACPL-P34x and ACPL-W34x optocoupler family is based on process technology that enables higher output
current drive with rail-to-rail capability, providing high-voltage insulation and robust protection for industrial drive, inverter and power supply applications. The optocouplers are available in a stretched SO6 package that is 40 to 50 percent smaller than industry-standard Dual-inline (DIP) package. With output current up to 4A - the market's highest in this package - the family provides reliable, fast and efficient system performance.

Traditionally, Avago gate drive optocouplers have used bipolar transistors for the output stage to deliver high output current. With process technology improvements, the output stage can now be replaced with bipolar CMOS/DMOS technology, which combines the high component density and low power consumption of CMOS with the high current drive and speed of bipolar process. The switching speed is also now twice as fast as the previous generation, reducing the dead time when both the high-side and low-side transistors are off from 700 ns to 200 ns for improved system efficiency.

The ACPL-P343/W343, ACPL-P341/W341 and ACPL-P340/W340 optocouplers come in 4A, 3A and 1A maximum peak output current, respectively. The wide range of output current allows the family to address systems with different power ratings, including Insulated Gate
Bipolar Transistor (IGBT) and MOSFET gate drive, industrial inverters, renewable energy inverters, AC and brushless DC motor drives, switching power supplies, induction cookers and inverters for home appliances. The high common mode rejection (CMR) of the optocouplers, at 35 kV/µs prevents erroneous driving of an IGBT and ensures reliable operation in noisy environments. The family's stretched SO6 packages are compliant to many industrial safety standards, including IEC/EN/DIN EN 60747-5-2, UL 1577 and CSA.

The Avago ACPL-P34x and ACPL-W34x optocoupler family is priced starting at $1.30 each in 10,000 piece quantities. Samples and production quantities are available now through the Avago direct sales channel and via worldwide distribution partners.

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